Home > Publications database > Anwendung von Zwei-Phasen-Diffusion zur Beschreibung der Freisetzung von Cäsium aus kugelförmigen HTR-Brennelementen |
Book/Report | FZJ-2016-03379 |
1976
Kernforschungsanlage Jülich, Verlag
Jülich
Please use a persistent id in citations: http://hdl.handle.net/2128/11635
Report No.: Juel-1323
Abstract: For the theoretical prediction of fission product release from HTR-fuel elements the one-dimensional diffusion code SLIPPER has been developed, which describes the transport of fission products optionally by one- or two-phase diffusion. The mathematical-physical basis and general program-technical aspects are presented. The application of the code to irradiation experiments with spherical fuel elements in the Studsvik R2-reactor shows that the experimentally measured concentration profiles and fractional releases of the isotope Cesium 137 can be very well reproduced by two-phase diffusion. The used transport data for the fuel particles are in good agreement with reference values; on the other hand, the diffusion coefficients of matrix graphite are much smaller than those measured for unirradiated reference samples.
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